Parse constructor field initializers with Fasta.

pkg/analyzer/test/generated/parser_test.dart

Index: pkg/analyzer/test/generated/parser_test.dart
diff --git a/pkg/analyzer/test/generated/parser_test.dart b/pkg/analyzer/test/generated/parser_test.dart
index 264cb69154d76ddd3b0d5672c2e5133bbd3c21f6..6a9f678e653adcd369f30b588206f8c2207c230a 100644
--- a/pkg/analyzer/test/generated/parser_test.dart
+++ b/pkg/analyzer/test/generated/parser_test.dart
@@ -1092,6 +1092,33 @@ abstract class ClassMemberParserTestMixin implements AbstractParserTestCase {
     expect(constructor.body, new isInstanceOf<EmptyFunctionBody>());
   }
 
+  void test_parseConstructor_initializers_field() {
+    createParser('C(x, y) : _x = x, this._y = y;');
+    ClassMember member = parser.parseClassMember('C');
+    expect(member, isNotNull);
+    assertNoErrors();
+    expect(member, new isInstanceOf<ConstructorDeclaration>());
+    ConstructorDeclaration constructor = member as ConstructorDeclaration;
+    NodeList<ConstructorInitializer> initializers = constructor.initializers;
+    expect(initializers, hasLength(2));
+
+    {
+      var initializer = initializers[0] as ConstructorFieldInitializer;
+      expect(initializer.thisKeyword, isNull);
+      expect(initializer.period, isNull);
+      expect(initializer.fieldName.name, '_x');
+      expect(initializer.expression, isNotNull);
+    }
+
+    {
+      var initializer = initializers[1] as ConstructorFieldInitializer;
+      expect(initializer.thisKeyword, isNotNull);
+      expect(initializer.period, isNotNull);
+      expect(initializer.fieldName.name, '_y');
+      expect(initializer.expression, isNotNull);
+    }
+  }
+
   void test_parseConstructor_assert() {
     enableAssertInitializer = true;
     createParser('C(x, y) : _x = x, assert (x < y), _y = y;');